Intel Xeon E3 1285 v4 's Advantages
Released 9 months late
Higher base frequency (3.5GHz vs 2GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (95W vs 120W)
Intel Xeon E5 2683 v3 's Advantages
Higher specification of memory (2133 vs 1866)
Larger L3 cache size (35MB vs 6MB)